A decision by the Canadian government clears the way for continued use of decamethylcyclopentasiloxane, or D5, in personal care products such as skin creams, antiperspirants, and shampoos. The ...

The addition polymerization of bicyclo[2,2,1]hept-2-ene (norbornene, NB) proceeds by double bond opening and leads to a saturated polymer chain with rigid bicyclic rings.

Of all siloxanes, D5 has been totally banned. Some reports link it to endocrine disruption. No regulation in India yet: This regulation is likely to percolate to India too.